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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

351 w knock

 
  #1  
Old 02-18-2011, 11:47 PM
mitchelljohnson1201
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351 w knock

hey got a 1993 ford f-250 with a 351w. a week after i put headers on my truck I started to notice a knock in the engine. I have plenty of oil pressure and of course oil.I only hear the knock when I accelerate really fast other wise its not noticeable. also if if I start it i dont hear it at idle nor on the throttle if Im not in gear. any Ideas?
 
  #2  
Old 02-19-2011, 12:02 AM
old_lynrd
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prolly an exhaust leak..the sound produced can mimic a knock..
 
  #3  
Old 02-19-2011, 12:03 AM
old_lynrd
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also..did u check and retorque ur header bolts after a few miles?
 

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